Dynamic routing is when protocols are used to find networks and update routing tables on routers. True, this is easier than using static or default routing, but it’ll cost you in terms of router CPU processing and bandwidth on the network links. A routing protocol defines the set of rules used by a router when it communicates routing information between neighboring routers.
The routing protocol I’m going to talk about in this chapter is Routing Information Protocol (RIP) versions 1 and 2.
Two types of routing protocols are used in internetworks: interior gateway protocols (IGPs) and exterior gateway protocols (EGPs). IGPs are used to exchange routing information with routers in the same autonomous system (AS). An AS is a collection ...